Unfortunately his case for the prosecution is not exactly conclusive. There's no doubt he was around when Hussein launched his "catastrophic" Iran-Iraq war. So, as I remember, were a fair collection of western governments who cheered him, if not all the way to Halabja, then certainly into the folly which cost at least a million lives on either side, but earned arms dealers and their governments plenty of lovely loot.

As far as providing a "veneer of international sophistication to a disgusting regime" one could argue that as Foreign Minister that was his job. It would be nice to be able to talk of Mr Straw in similar terms.